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2008-09-25Btrfs: Handle write errors on raid1 and raid10Chris Mason
When duplicate copies exist, writes are allowed to fail to one of those copies. This changeset includes a few changes that allow the FS to continue even when some IOs fail. It also adds verification of the parent generation number for btree blocks. This generation is stored in the pointer to a block, and it ensures that missed writes to are detected. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Pass down the expected generation number when reading tree blocksChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Don't do btree balance_dirty_pages on old kernels, it stalls foreverChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Chunk relocation fine tuning, and add a few printks to show progressChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: A number of nodatacow fixesChris Mason
Once part of a delalloc request fails the cow checks, just cow the entire range It is possible for the back references to all be from the same root, but still have snapshots against an extent. The checks are now more strict, forcing cow any time there are multiple refs against the data extent. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Only open block devices once during mount -o subvol=Chris Mason
btrfs_open_devices needed a check to see if the device was already open. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Update nodatacow mode to support cloned single files and resizingChris Mason
Before, nodatacow only checked to make sure multiple roots didn't have references on a single extent. This check makes sure that multiple inodes don't have references. nodatacow needed an extra check to see if the block group was currently readonly. This way cows forced by the chunk relocation code are honored. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Properly find the root for snapshotted blocks during chunk relocationChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add support for online device removalChris Mason
This required a few structural changes to the code that manages bdev pointers: The VFS super block now gets an anon-bdev instead of a pointer to the lowest bdev. This allows us to avoid swapping the super block bdev pointer around at run time. The code to read in the super block no longer goes through the extent buffer interface. Things got ugly keeping the mapping constant. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Fix clone ioctl to not hold the path over insertsChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Silence bogus inode.c compiler warningsChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add workaround for AppArmor changing remove_suid()Jeff Mahoney
In openSUSE 10.3, AppArmor modifies remove_suid to take a struct path rather than just a dentry. This patch tests that the kernel is openSUSE 10.3 or newer and adjusts the call accordingly. Debian/Ubuntu with AppArmor applied will also need a similar patch. Maintainers of btrfs under those distributions should build on this patch or, alternatively, alter their package descriptions to add -DREMOVE_SUID_PATH to the compiler command line. Signed-off-by: Jeff Mahoney <jeffm@suse.com> - --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ b/compat.h 2008-02-06 16:46:13.000000000 -0500 @@ -0,0 +1,15 @@ +#ifndef _COMPAT_H_ +#define _COMPAT_H_ + + +/* + * Even if AppArmor isn't enabled, it still has different prototypes. + * Add more distro/version pairs here to declare which has AppArmor applied. + */ +#if defined(CONFIG_SUSE_KERNEL) +# if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22) +# define REMOVE_SUID_PATH 1 +# endif +#endif + +#endif /* _COMPAT_H_ */ - --- a/file.c 2008-02-06 11:37:39.000000000 -0500 +++ b/file.c 2008-02-06 16:46:23.000000000 -0500 @@ -37,6 +37,7 @@ #include "ordered-data.h" #include "ioctl.h" #include "print-tree.h" +#include "compat.h" static int btrfs_copy_from_user(loff_t pos, int num_pages, int write_bytes, @@ -790,7 +791,11 @@ static ssize_t btrfs_file_write(struct f goto out_nolock; if (count == 0) goto out_nolock; +#ifdef REMOVE_SUID_PATH + err = remove_suid(&file->f_path); +#else err = remove_suid(fdentry(file)); +#endif if (err) goto out_nolock; file_update_time(file); Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Fix do_sync_file_range ifdefs (2.6.22)Chris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Compile warning fixup in volume.cChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Clone file data ioctlSage Weil
Add a new ioctl to clone file data Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Fixes for 2.6.18 enterprise kernelsChris Mason
2.6.18 seems to get caught in an infinite loop when cancel_rearming_delayed_workqueue is called more than once, so this switches to cancel_delayed_work, which is arguably more correct. Also, balance_dirty_pages can run into problems with 2.6.18 based kernels because it doesn't have the per-bdi dirty limits. This avoids calling balance_dirty_pages on the btree inode unless there is actually something to balance, which is a good optimization in general. Finally there's a compile fix for ordered-data.h Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Tune stripe selection for raid1 and raid10Chris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Deal with failed writes in mirrored configurationsChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Drop some verbose printksChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add balance ioctl to restripe the chunksChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add new ioctl to add devicesChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Do more optimal file RA during shrinking and defragChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Avoid recursive chunk allocationsChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Make the resizer work based on shrinking and growing devicesChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: write_cache_pages came in 2.6.22Chris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add failure handling for read_sys_arrayChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: write_extent_pages came in 2.6.23Chris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Throttle file_write when data=ordered is flushing the inodeChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Fix balance_level to free the middle block if there is room in the ↵Chris Mason
left one balance level starts by trying to empty the middle block, and then pushes from the right to the middle. This might empty the right block and leave a small number of pointers in the middle. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Don't empty the middle buffer in push_nodes_for_insertChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Fix split_node to require more empty slots in the node as wellChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Make sure nodes have enough room for a double splitChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Fix the unplug_io_fn to grab a consistent copy of page->mappingChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Fix btrfs_get_extent and get_block corner cases, and disable O_DIRECT readsChris Mason
The generic O_DIRECT code assumes all the bios have the same bdev, which isn't true for multi-device btrfs. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Set nodatasum on the inode when written by a nodatasum mountChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Deal with page == NULL in the btrfs_unplug_io_fnChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add a special device list for chunk allocationsChris Mason
This allows other code that needs to walk every device in the FS to do so without locking against allocations. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Simplify device selection for mirrored readsChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Make an unplug function that doesn't unplug every spindleChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Remove debugging statements from the invalidatepage callsChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add 1MB to the min_free in alloc_chunkChris Mason
This properly reflects the first 1MB we skip at the start of the device Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Scale the bdi ra_pages by the number of devices in the FSChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Force page->private removal in btrfs_invalidatepageChris Mason
btrfs_invalidatepage is not allowed to leave pages around on the lru. Any such pages will trigger an oops later on because the VM will see page->private and assume it is a buffer head. This also forces extra flushes of the async work queues before dropping all the pages on the btree inode during unmount. Left over items on the work queues are one possible cause of busy state ranges during truncate_inode_pages. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Set the btree inode i_size to OFFSET_MAXChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Fix chunk allocation when some devices don't have enough room for stripesChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Calculate appropriate chunk sizes for both small and large filesystemsChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Don't drop extent_map cache during releasepage on the btree inodeChris Mason
The btree inode should only have a single extent_map in the cache, it doesn't make sense to ever drop it. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Add support for labels in the super blockChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Check device uuids along with devidsChris Mason
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: Remove bogus max_sector warnings from the extent_io codeChris Mason
It was testing the bio before doing logical->physical mapping, so the test was always wrong. Signed-off-by: Chris Mason <chris.mason@oracle.com>
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